【Q&A Question 133】2017.05.13
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This post was last edited by 955559 on 2017-7-21 22:55. [Q&A Question 133] May 13, 2017: How should emergency measures be taken in the event of a hydrogen leak? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Emergency response: Quickly evacuate people from the area contaminated by the leak to an upwind location, isolate the area, and strictly restrict access ； Cut off the source of fire ； It is recommended that emergency responders wear self-contained positive-pressure breathing apparatus and anti-static work clothing, and try to shut off the source of the leak ； Make reasonable use of natural ventilation to accelerate exhaust dispersion ； Leaking containers must be handled properly; they should be repaired and tested to ensure they are in good condition before being used again. Scoring criteria: 2 Wealth points for incorrect attempts; 3–8 points for *incomplete* answers. 10 Wealth points for correct answers, provided with a detailed explanation; 15–20 Wealth points if the answer is correct but lacks sufficient details. Please score according to these criteria. 2017 Q&A Summary Thread (updating now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updating now) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (already updated) http://bbs.hcbbs.com/thread-1597792-1-1.html
Use steam as a shield to cut off the source of the leak; in severe cases, trigger a fire alarm
:Evacuate people from the area contaminated by the leak to an upwind location and isolate it, imposing strict restrictions on access; eliminate any sources of fire; it is recommended that emergency responders wear self-contained positive-pressure breathing apparatus and anti-static clothing, and close the valves at the site of the leak
1. Report in a timely manner； 2. For pipelines or equipment that can be cut out, cut them out promptly, use cross-connections, and at the same time prepare to reduce temperature and flow rate; stop the feed and initiate circulation. 3. In cases where cutting out is not possible, proceed with shutdown procedures and stop the supply of fresh hydrogen immediately.
Depending on the situation, if the leakage is minor, reduce pressure and flow and implement containment; if the leakage is severe, activate emergency pressure relief
Protect the leak site with steam or nitrogen,
Quickly evacuate people from the contaminated area to a safe zone, isolate it, and strictly restrict access. Cut off the source of fire. It is recommended that emergency responders wear self-contained positive-pressure breathing apparatus and fire protection clothing. Seal the source of leakage as much as possible. Prevent entry into confined spaces such as sewers and drainage ditches. Minor leaks: Absorb with sand, vermiculite, or other inert materials. Or, if safety permits, burn it on the spot. Large-scale leakage: Build dikes or dig pits to contain it; cover it with foam to reduce vapor hazards. Transfer to a tank truck or specialized collector using an explosion-proof pump, and recycle it or transport it to a waste disposal facility for disposal.
1. Perform an emergency shutdown of the system and gradually reduce the pressure, but it is essential to maintain pressure – negative pressure must under no circumstances occur! 2. Try to connect temporary pipelines from an appropriate location and introduce steam or nitrogen to extinguish it. 3. It is necessary to strengthen the protection of adjacent equipment or devices, especially those that are flammable and explosive, in order to prevent secondary disasters.
People were quickly evacuated to the upwind area; access for people and vehicles was prohibited, the source of the leak was located, and it was shut off
1. Immediately cut off the source of the leak. 2. Bring an explosion-proof hydrogen detector and go to the site to locate the source of the leak. 3. Bring a copper F wrench